Cylindrical valve assembly



May 8,1945. G. T. DOWNEY CYLINDRICAL VALVE ASSEMBLY 5 Sheets-Sheet 1 Filed Oct. 5, 1943 zlwuexwtom .affiawney y I I i "G. T. DOWNEY 2,375,633

- CYLINDRICALYALVE ASSEMBIJY Filed 061;. 5, 1945 i 3 Sheets-Sheet 2 GED-010726 gmem y 1945- G. T. DOWNEY 2,375,633

GYLINDRICAL VALVE ASSEMBLY- Filed Oct. 5, 1943 3 Sheets-Sheet 3 afpowney a valve structure which Patented May 8, 1945 2,375,633 CYLINDRJCAL VALVE ASSEMBLY George T. Downey, Corry,

Supply Mfg. Co.

Pa., assignor to Aero Inc., Corry, Pa.

Application October 5, 1943, Serial No. 505,060 2 Claims. (Cl. 251-413) This invention relates to multi-port valve assembliesyand more particularly to an improved seal for the rotary plug.

An object of this invention is to provide an improved valve plug and seat assembly which will permit the construction of the complete valve structure with a minimum of grinding or lapping.

Another objector this invention is to provide a spring-pressed seat for the rotary plug about each one of the plurality. of ports so that the plug will be adequately sealed within the housing. and so that in the event of leakage through one port, a new seat may be inserted without taking the entire valve structure apart and without regrinding the plug or correlated parts.

A further object of this invention is to provide 'a renewable valve seat which includes a metal shell slidable in the valve port and a ring-shaped resilient sealing element secured to the inner end of the shell for contact with the periphery of a rotary valve plug.

'A further object of this invention is to provide will permit speeding up of construction of the parts making up the structure, and will permit final assembly of the parts on an assembly line, the parts being so con structed that close tolerances are avoided and at the same time the assembly will be leakprooi for gasoline or other fluids.

With the foregoing objects in view, and others which may hereinafter more fully appear, the invention consists of the novel construction, combination and arrangement of parts, as will be more specifically described, and illustrated in the accompanying drawings wherein are shown embodiments of the invention, but it is to be understood that changes, variations and modifications may be resorted to which fall within the scope of the invention-as claimed.

In the drawings:

Figure 1 is a detail side elevation, partly broken away, of. a valve structure constructed according to an embodiment of this invention, one head or end of the valve being removed;

Figure 2 is a sectional view taken on the line 2-2 of Figure 1;

' Figure 3 is a sectional view taken on the line 3-4 of Figure 2;

Figure 4 is a fragmentary sectional view taken on the line 4-4 of Figure 1; and

Figure 5 is an enlarged fragmentary sectional view of the valve structure.

Referring to the drawings the numeral l0 designates generally a valve housing which is formed and is seated in diametrically of a. body H having an outlet boss or bushing the head It includes a -40 formed in the head 22.

I2, and a plurality of radially arranged inlet bosses or bushings l3 and H. A head or plate |4a is secured to one side of the body H, by fastening members secured to the opposite side of the body H, by fastening members H. In the present instance bushing l8 which is interiorly threaded as at l9 whereby an outlet pipe may be connected with the bushing I 8.

The body H, is of hollow construction and is formed with a circular bore 20 within which a cylindrical rotary valve plug 2| is adapted to be loosely and rotatably mounted. The valve plug 2| includes an end wall 22 having formed integral therewith a cylindrical side wall 23 which opens in the direction of the outlet boss l2. The side wall 23 is provided with a single inlet port or opening 24 so that the interior of the plug 23 may be selectively placed in communication with a selected one of the several inlet ports. The boss or bushing I3 is provided with an inlet port 25 and the boss I4 is provided with an inlet port 26. The valve plug 2| is mounted on an operating shaft 21 which is rotatably disposed through the head Ma.

The shaft 21 is formed with an enlarged annular flange 28 at the inner end thereof, and a reduced stub shaft 29 extends inwardly to the flanged inner end 28, being loosely disposed through a central opening 30 formed in the head or end wall 22. The plug 2| is held against rotation with respect to the shaft 21 by means of a pin 3| which extends through the shaft 21 opposed recesses 32 which are formed in the outer side of the end wall 22 of the plug 2|. The plug 2| is held in a sealed position with the intake port 24 thereof in registry with a selected one of the several intake ports by means of an index structure which includes an annular plate 33 interposed between the outer side of the wall 22 and the inner side of the head I411. The plate 23 is provided with a pair of diametrically opposed tongues 34 hav ing out-turned ends 3 5 which engage in recesses 36 formed in the inner side of the head Ma. The plate 33 is formed with a plurality of radially arranged detents 31 having the concave side thereof innermost and balls 38, which are rotatable with the plug 2|, are adapted to engage in the concaveinner sides of the detents 31. Each ball 38 is mounted on a pin or shaft 39 which is longer than the diameter of the ball and which has the oppositepends thereof loosely seated in recesses A resilient sealing ring 4| is disposed about the shaft 21 on the inner side of the head Ma and is mounted within a metal retainer 42, as shown in Figure 2. A sealing ring 43 is interposed between the head Na and the body H, and a sealing ring 44 is interposed between the body I and the head IS.

The stub shaft 29 is rotatably mounted in a bearing sleeve 45 which is carried by a pair of inwardly convergent arms 46 flxed to or formed integral with the head It. A spring 41 is disposed about the bearing 45 and bears at one end against the adjacent end of the bearing 45 where it joins with the arms 46 and at the opposite end bears against a washer 48 mounted on the stub shaft 29 on the inner side of the head 22. The spring 41 constantly urges the valve plug 2| to the left or in the direction of the head He and compresses the sealing member 2| in order to provide a resilient means for holding resiliently the balls 38 in the detent 31.

The plug 2| is adapted to be sealed with respect to the inlet ports by means of a combined valve seat and seal which includes a cylindrical body 49 loosely disposed in an inlet port. ,The body 49 is slidable within an annular flange 50 carried by a sealing gasket which is interposed between the outer end of an inlet bushing and a connector bushing 52 which is secured to the housing H at the outer end of the inlet port. The cylindrical body 59, at its inner end, is formed with an outwardly extending annular flange 53 and is also formed with an inwardly extending annular flange 54. The periphery of the outer flange 53 slidingly engages theinlet port, whereas the inner flange 48 provides a seat against which the inner end of a spring 54 is adapted to engage. The outer end of the spring 54, which constantly urges the valve seat structure inwardly, bears against a ring 55 which is mounted in an annular rabbet 55 formed in the inner end of the connector 52.

A ring-shaped resilient sealing member 51 is fixed to the inner sides of the two flanges 53 and 54, the sealing member 51 being substantially triangular in transverse section and concave at its inner side in side elevation so that the peak 58 of the sealing member will sealingly contact with the periphery of the cylindrical plug body 23.

The sealing member 58, which also forms a. valve seat, may be constructed of rubber, either natural or synthetic, or of rubber compositions, and is vulcanized or otherwise firmly attached to the inner end of the combined seat and seal. The provision of the resilient seat and seal 51, which is secured to the inner end of the body 49, provides a removable cage and seat so that it will not be necessary to grind the plug 23 to the valve seat. In' other words the spring 54 will yieldingly hold the seal 51 against the outer side of the plug 2| and the latter may have the periphery thereof ground or otherwise smoothed so that the resilient seal 51 will provide a fluidtlght joint.

With a construction as hereinbefore described, it is not necessary to grind or lap the plug 23 in the bore 20 of the housing body II, and each valve seat can be constructed as a separate unit for insertion within the valve port thereby permitting the construction of the entire assembly in units and their final assembly may be quickly put together in such a manner that a fluidtight seal will be provided between the rotary valve plug and the several ports.

The provision of the yieldable seal on the inner end of the valve cage will permit renewal of the seal in the inlet port without taking the entire valve structure apart and without regrinding any of the old or new parts.

I claim:

1. In a valve structure comprising a housing having at least one inlet port and an outlet port, a cylindrical valve plug rotatable in said housing, said plug being formed of a cylindrical side wall having a port therein for selective registry with said inlet port, said plug including an end wall at one end of said side wall, the other end of said plug being open and confronting said outlet port, and means for sealing said plug with respect to said inlet port, said means including a cylindrical member slidable in said inlet port, inwardly and outwardly projecting flanges at the inner end of said cylindrical member, a yieldable sealing element carried by said flanges and hearing against the periphery of said plug, a cylindrical sealing sleeve engaging about the outer side of said cylindrical member, and a spring within said cylindrical member bearing at its inner end against said inwardly projecting flange for constantly urging said cylindrical member inwardly.

2. A valve structure as set forth in claim 1 wherein said sealing element is triangular in transverse section with the apex contacting the periphery of said plug.

GEORGE T. DQWNEY. 

